There's a climate threat lurking in rivers around the world. New research shows where
More than 100 scientists collected samples from rivers in 40 countries to create a map showing how humans are altering waterways, causing them to emit more carbon dioxide into the atmosphere and contribute to climate change.
![There's a climate threat lurking in rivers around the world. New research shows where](https://i.cbc.ca/1.3796359.1717100732!/fileImage/httpImage/image.jpg_gen/derivatives/16x9_620/177660677.jpg)
![Seagulls on Hamilton Bay, Lake Ontario, Ontario, Canada Seagulls on a lake with industry in background](https://i.cbc.ca/1.3796359.1717100732!/fileImage/httpImage/image.jpg_gen/derivatives/16x9_620/177660677.jpg)
More than 100 scientists collected samples from rivers in 40 countries to create a map showing how humans are altering waterways, causing them to emit more carbon dioxide into the atmosphere and contribute to climate change.